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I'm probably over-thinking this - I'm thinking about tumble control and harmonics that engineers build into intakes to allow air to flow better into the combustion chamber for a better mixture.

I realize that if your goal is high-rpm, WOT performance the less restriction the better as a general rule - don't know what the implications are for the whole powerband though. Probably not significant either way, but just a thought.

ive just heard from friends with similiar apparatus's on their cars gained a little power and noise =( when they removed them.... as there would be a straight shot into the airbox instead of these resonators...

ive just heard from friends with similiar apparatus's on their cars gained a little power and noise =( when they removed them.... as there would be a straight shot into the airbox instead of these resonators...

Now if you're talking about the silencer assembly in front of the airbox, yes, I did have positive experiences removing it. We call it the snorkus here in the Subaru community.